HC
Harry Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · Fulton-County, Illinois
Our Model Tree links this Harry Clark across the 1920, 1930 and 1940 US Censuses in Fulton-County, Illinois (XGBoost, ~Confirmed), with identified parents Leha & Lewis — first a son (b.~1917), then head of a 6-person household.
Age 23
b. ~1917
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Fulton-County, Illinois |
| Surname | Clark |
| Given Name | Harry D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Putman Township |
| 1935 Residence (County) | Fulton |
| Additional Details | |
| Occupation | Laborer |
| Industry | Railroad maintenance |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 780 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Laborer |
| Township / Ward | Putman Township |
| Est. Birth Year | ~1917 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Harry | Age | Birth yr |
|---|---|---|---|---|
| Harry Clark | Son | — | 23 | ~1917 |
| Robert Clark | Son | — | 11 | ~1929 |
| Marvin Clark | Son | — | 16 | ~1924 |
| Frances Clark | Son | — | 8 | ~1932 |
| Leslie Clark | Son | — | 13 | ~1927 |
| Mary Clark | Spouse | — | 49 | ~1891 |
Census Appearances
1920
Fulton, Illinois
Son, age 2
Fulton, Illinois · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Harry D |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Fulton, Illinois
Son, age 12
Fulton, Illinois · implied b. ~1918 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Harry D |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Fulton-County, Illinois
Son, age 23
Fulton-County, Illinois · implied b. ~1917 — 6 household members
| Surname | Clark |
| Given Name | Harry D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Putman Township |
| 1935 Residence (County) | Fulton |
| Occupation | Laborer |
| Industry | Railroad maintenance |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 780 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Harry Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Leha Clark (~0.83 confidence) and father Lewis Clark (~0.83 confidence) and father Samuel Clark (~0.92 confidence) and mother Mary Clark (~0.92 confidence) and mother Mary Clark (~0.92 confidence). The pedigree spans 2 generations with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.88
Mother
Leha Clark
b. ~1867
Source father>mother
● Household
· direct · ~0.83
Father
Lewis Clark
b. ~1867
Source father>father
● Household
· direct · ~0.83
Father
Samuel Clark
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Mary Clark
b. ~1891
Source mother
● Household
· direct · ~0.92
Mother
Mary Clark
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harry Clark
Son · 1940 · age 23 · b. ~1917 · Illinois
★ You are viewing this record
Sibling
Marvin Clark
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leslie Clark
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Clark
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Clark
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Fulton-County, Illinois
Open full size
1940 US Federal Census — Fulton-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00806-00490)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary E. Clark | 49 | Wife | — | Illinois |
| 2 | Harry D. Clark THIS PERSON | 23 | Son | Laborer | Illinois |
| 3 | Marvin W. Clark | 16 | Son | — | Illinois |
| 4 | Leslie A. Clark | 13 | Son | — | Illinois |
| 5 | Robert E. Clark | 11 | Son | — | Illinois |
| 6 | Frances L. Clark | 8 | Son | — | Illinois |
| 7 | Herschel Esker | 51 | Head | Laborer | Illinois |
| 8 | L. Elizabeth Esker | 45 | Wife | — | Illinois |
| 9 | William E. Fazale | 62 | Head | Laborer | Illinois |
| 10 | Lucile Fazale | 54 | Wife | — | Virginia |
| 11 | Bertie D. Herring | 58 | Head | Farmer | Illinois |
| 12 | Ella V. Herring | 56 | Wife | — | Illinois |
| 13 | Horace H. Herring | 60 | Head | Farmer | Illinois |
| 14 | Grace L. Herring | 55 | Wife | — | Illinois |
| 15 | Leonard R. Lambert | 20 | Hired Man | Laborer | Illinois |
| 16 | Lloyd L. Henderson | 28 | Head | Laborer | Illinois |
| 17 | Mary E. Henderson | 27 | Wife | — | Illinois |
| 18 | Lee Henderson | 70 | Head | Farmer | Illinois |
| 19 | Cora E. Henderson | 60 | Wife | — | Illinois |
| 20 | Martin Eidman | 55 | Head | Farmer | Illinois |
| 21 | Mary Eidman | 50 | Wife | — | Illinois |
| 22 | John T. Hummel | 47 | Head | Farmer | Illinois |
| 23 | Veda F. Hummel | 45 | Wife | — | Illinois |
| 24 | Robert M. Hummel | 15 | Son | — | Illinois |
| 25 | Josiah Evans | 46 | Head | Farmer | Illinois |
| 26 | Blanche Evans | 48 | Wife | — | Illinois |
| 27 | Donald E. Evans | 14 | Son | — | Illinois |
| 28 | Marion L. Evans | 10 | Daughter | — | Illinois |
| 29 | Chellis E. Evans | 5 | Son | — | Illinois |
| 30 | H. Ross Saunders | 50 | Head | Farmer | Illinois |
| 31 | Grace A. Saunders | 45 | Wife | — | Illinois |
| 32 | L. Dwight Rock | 39 | Head | Farmer | Illinois |
| 33 | Eva M. Rock | 40 | Wife | — | Illinois |
| 34 | Alice D. Rock | 16 | Daughter | — | Illinois |
| 35 | Robert D. Rock | 14 | Son | — | Illinois |
| 36 | Donald E. Rock | 13 | Son | — | Illinois |
| 37 | Helen M. Rock | 10 | Daughter | — | Illinois |
| 38 | Ora J. Berry | 58 | Head | Farmer | Illinois |
| 39 | Frances Berry | 48 | Wife | — | Illinois |
| 40 | Dewayne Berry | 19 | Son | — | Illinois |
Related Census Records
Pedigree Summary
Harry + 4 siblings
Gen 1 · 3 parents
~0.92
Gen 2 · 2 grandparents
~0.83
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)